2112202111221 has 32 divisors (see below), whose sum is σ = 3313904901120. Its totient is φ = 1325044611072.

The previous prime is 2112202111207. The next prime is 2112202111237. The reversal of 2112202111221 is 1221112022112.

2112202111221 is a `hidden beast` number, since 2 + 11 + 220 + 211 + 1 + 221 = 666.

It is not a de Polignac number, because 2112202111221 - 2⁵ = 2112202111189 is a prime.

It is a super-2 number, since 2×2112202111221² (a number of 25 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2112202111194 and 2112202111203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2112202111421) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1918716 + ... + 2811738.

It is an arithmetic number, because the mean of its divisors is an integer number (103559528160).

Almost surely, 2^{2112202111221} is an apocalyptic number.

It is an amenable number.

2112202111221 is a deficient number, since it is larger than the sum of its proper divisors (1201702789899).

2112202111221 is a wasteful number, since it uses less digits than its factorization.

2112202111221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 898202 (or 898196 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 18.

Adding to 2112202111221 its reverse (1221112022112), we get a palindrome (3333314133333).

The spelling of 2112202111221 in words is "two trillion, one hundred twelve billion, two hundred two million, one hundred eleven thousand, two hundred twenty-one".